The sequel to <IT>Leviathan<RO> continues in an alternate 1914 Europe where Austrian Prince Alek and Deryn, a girl disguised as a male in the British Air Service, are attempting to deliver a secret package and, still hiding respective truths about their identities, land in a hostile, politically-charged Constantinople, where they must forfeit their airship, <IT>The Leviathan<RO>, in order to survive. 250,000 first printing.